Frequently Asked Questions

What is the most common reason for check engine light on a 2025 Lexus LS 500?

• Common causes include a loose or damaged gas cap, faulty oxygen sensors, catalytic converter problems, or engine misfires.
• Evaporative emissions (EVAP) leaks and fuel trim issues are frequent triggers that affect emissions and fuel economy.
• Small sensor faults can lead to larger issues if ignored — early diagnosis reduces repair scope and cost.
• Bringing your vehicle to Nalley Lexus Smyrna ensures accurate diagnosis with Lexus-specific tools and factory-trained technicians.

What does it mean when the check engine light comes on in a 2025 Lexus LS 500?

• The light is a warning that an emissions, ignition, fuel, or sensor issue has been detected by the vehicle’s computer.
• It can indicate anything from a minor fault to a condition that could damage the engine or emissions system if left untreated.
• Nalley Lexus Smyrna uses OEM scanners to read trouble codes, interpret live data, and recommend the correct repair path.
• Repairs covered under warranty must be performed at a certified dealership to preserve coverage and maximize long-term savings.

What is the first thing to check when the check engine light comes on?

• Quick checks you can do: ensure the gas cap is tightened, check fluid levels, and confirm there’s sufficient fuel.
• If the car feels different (rough idle, reduced power), avoid extended driving and have it inspected promptly to prevent damage.
• For warranty protection and accurate repairs, have Nalley Lexus Smyrna perform the diagnostic — our certified team preserves coverage and often costs less over time.

How much does a check engine light diagnostic cost for a 2025 Lexus LS 500?

• Diagnostic scan fees typically range based on complexity; many scans fall within a modest range, while deeper diagnostics may cost more.
• Nalley Lexus Smyrna often provides competitive diagnostic pricing and transparent estimates, and customers frequently save immediately compared with repeat visits to independent shops.
• Performing repairs at our dealership protects warranty coverage; any warranty-covered repairs must be completed at a certified Lexus dealership.
• Early dealership diagnosis reduces long-term expense by identifying issues before they escalate into costly engine or emissions repairs.

How long does a check engine light service take?

• Simple scans and code readings typically take 30–60 minutes; identifying intermittent faults or performing repairs may take several hours or longer.
• Nalley Lexus Smyrna’s factory-trained technicians use specialized tools and vehicle-specific procedures to speed diagnosis while ensuring accuracy.
• If parts or deeper repairs are required, we provide clear timelines and work to minimize your vehicle downtime and total cost.
• Repairs done at our certified dealership protect warranty coverage and often deliver immediate and long-term savings by preventing repeat failures.